Following the proof of Lemma 2.4 in [1]}, we can get
\(&\Vert u(t)\Vert _{H^s} \le \left\Vert u_{0}\right\Vert _{H^s} \exp \Big (C \int _{0}^{t}\Vert u(\tau )\Vert _{\mathrm {Lip}} \mathrm {d}\tau \Big )\) 
